A

Admin • 831K Points
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Q. Two trains cross each other in 20 seconds moving in same direction at speeds 72 km/h and 54 km/h. What is their total length?

  • (A) 200 m
  • (B) 300 m
  • (C) 400 m
  • (D) 500 m
Explanation by: Admin
Relative speed = (72−54)×5/18 = 5 m/s → Length = 5×20 = 100 m (combined concept-based).

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